数组除重:
新建一个空数组,利用中间状态,遇到相同数字时,其状态为1时跳出循环,新数组内没有则压入数组中。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
</body>
</html>
<script>
arr=[4,4,4,4,4,5,6,6,6,7,7,9,9,0,5,3,3,]
for(i=0;i<arr.length;i++){
for(a=i+1;a<arr.length;a++){
if(arr[a]==arr[i]){
arr[i]="a"
}
}
}
arr1=[]
for(b=0;b<arr.length;b++){
if(arr[b]!="a"){
arr1.push(arr[b])
}
}
for(var x in arr1){
document.write(arr1[x]+",");
}
</script>
随机点名:
利用Math.random()写一个x人为x*将随机数的范围限定为1-x之间,再用Math.floor()将所得的数进行取整,然后新建一个数组,将人名放入其中,用x*Math.random()求出随机人名
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
</body>
</html>
<script>
a=Math.random()
b=10*a
c=Math.floor(b)
arr=["孙桂林","孙勃","孙振坤","刘裕泽","赵东","高鲁强","司书旭","周新","李晓彤","郭鹏"]
var a=new Date()
b=10*Math.random()
alert(arr[c])
</script>